WO2021069778A1

WO2021069778A1 - Numerically-controlled cutting table with automatic extraction of pieces

Info

Publication number: WO2021069778A1
Application number: PCT/ES2020/070593
Authority: WO
Inventors: Carlos Pérez Vidal; Adrián Hernández Hernández
Original assignee: Simplicity Works Europe, S.L.
Priority date: 2019-10-10
Filing date: 2020-09-30
Publication date: 2021-04-15
Also published as: ES2818994A1

Abstract

A numerically-controlled cutting table comprising a cutting surface (1) configured to receive at least one sheet of material (4), a cutting head (3) configured to perform at least one cut on the sheet (4) so as to divide the sheet (4) into at least one designed component (2) and a surplus (7), a plurality of principal fastening elements (8), a plurality of additional fastening elements (9) located opposite the plurality of principal fastening elements (8), where the principal fastening elements (8) are configured so as to penetrate the hidden side (6) of at least one designed component (2); and the additional fastening elements (9) are configured so as to penetrate the visible side (5) of the surplus (7), where a relative displacement of the principal (8) and additional (9) fastening elements automatically removes the surplus (7) from the designed components (2).

Description

CUTTING TABLE BY NUMERICAL CONTROL WITH AUTOMATIC EXTRACTION

OF PIECES

DESCRIPTION

Field of the invention

The apparel and footwear manufacturing industry relies on various resources, processes, and equipment to produce finished products (apparel, accessories, footwear, etc.). Generally, the manufacturing process of these elements includes the design and cutting of the necessary patterns to generate the product through the use of natural or synthetic fabrics or leathers that at some point will be part of the manufactured product. These panels can be cut manually or automatically through the use of numerical control cutting tables, but even in the second case, the intervention of an operator is required to separate the designed pieces from the panel that contained them. The present invention refers to a numerical control cutting table that allows the extraction of the cut pieces in an automatic way, without the intervention of an operator, provided with a numerical control or calculation unit with a circuit and the program code for controlling the cutting machine, which comprises a storage unit for storing instructions for the pieces or patterns to be cut and for the control process necessary to separate them. The numerical control cutting table is applicable in the textile industry, natural and synthetic leather, composites, etc., in general, in any industry that requires the cutting of a flexible panel, into independent sheets or from a continuous roll, that has to be later used to generate a product.

Background of the invention

There are different patents associated with the automatic manufacture of clothing or footwear and the manufacture on demand thereof to customize the product according to the needs or tastes of the client. This is the case of document US9623578B1 that describes the procedure and equipment for making garments to order. In this case, the cut of the fabric that will make up the product is replaced by the printing of the same. Except in the case of fabric printing, the products are manufactured by cutting the pieces that will make them up from a sheet of material. This cut can be done manually, semi-automatically or fully automatic. by using numerical control cutting tables.

The numerical control cutting tables known in the state of the art have a support surface on which a plate to be cut is placed, or a series of superimposed layers on which a cutting head acts. The cutting head is controlled by a numerical control system, and requires a two-axis mobile bridge on which it rests in its movement on the flat base of the machine.

The head cuts the pieces with the required shape on the complete plate (or superposition of several plates) extended on the cutting surface, so that once said final pieces have been cut, the work of an operator is required so that in such a way manually remove them manually from the media plate.

The tables perform the cutting of the material with high precision, but at the end of the cutting work the pieces are in many cases partially joined to the sheet from which they are extracted, in such a way that traditional numerical control cutting tables make it necessary to perform removing parts manually when the head cutting job is finished.

Taking into account the above, the cutting work of the numerical control tables known in the state of the art always requires the presence of an operator whose downtime is high since once the material plate or the overlapping them, you can only wait for the cutting head to finish its work to separate the cut pieces from the excess material. Once the material already cut has been removed, the same work cycle is started again with a single plate or a set of them.

Document WO2018184677A1 is known in the state of the art, which discloses a machine designed to cut objects with a flat surface that has a graphic design with optical registration characteristics, which comprises a work surface to receive at least one object, a first unit camera arranged in relation to the work surface in such a way that the field of view of the same covers the entire work surface, a group arranged on the work surface movably, and at least one cutting device to cut at the minus one object, and a computing unit with a circuit and the program code for controlling the cutting machine, comprising a storage unit for storing instructions for cutting certain objects, the computing unit comprising a circuit and a program code for evaluating images from the first camera unit and is designed to identify the registration characteristics of at least one object in an image from the first camera unit, and is designed to define a cutting path for the cutting device in accordance with at least one stored instruction and based on the register positions in the image.

Document WO2011045729A1 is also known in the state of the art, which discloses a machine for cutting and / or engraving articles that comprises a flat surface on which the designs and / or writings are reproduced, where the machine comprises an operating group arranged on a working plane, the working plane of which is provided with an upper surface for receiving articles, the operating group is movable along the working plane to work on the articles and comprises means for cutting and / or engraving the articles and a first means optics to detect designs and / or writings reproduced on the articles when the articles are arranged on the working plane, the machine further comprises a second optical means arranged in a way with respect to the surface that detects the orientation and position of the articles in the work plane, as well as the designs and / or the writings reproduced in the articles.

Document US520059 is also known in the state of the art, which describes an automatic cutting apparatus for fabrics that can generate pieces cut according to the characteristics of the fabric under optimal conditions. Depending on the cutting apparatus, the fabric can be cut by automatically setting the optimal cutting condition when designating the type of fabric to be cut. The material to be cut can come from a roll of continuous fabric.

Description of the invention The manufacture of products based on flat pieces is widely extended in the textile, footwear, accessories and composites industries, among others. Automated manufacturing using these elements begins with the receipt of an order or set of them in the upper part of the automation pyramid, which in an organized way transmits the necessary orders so that the industrial machinery begins to enhance the product manufacturing subtasks. . This automated machinery begins with access to raw materials stored in the factory so that they arrive at an automatic or numerical control cutting table that, using the information of the product patterns to be generated, cuts the pieces and separates them from an excess material. By means of a set of treadmills, the cut pieces pass in front of one or more robots that recognize them by means of artificial vision and order them in the necessary way to allow automated manufacturing (eg grouped by type or by product). Following automated manufacturing operations, the product or products are packaged for distribution to the point of sale. This topology enables custom made on-demand products and fully automates the goods manufacturing process.

The object of the present invention focuses on the subtask of extraction of the cut pieces from the numerical control cutting table, therefore a numerical control cutting table is the object of the invention that comprises a cutting surface configured to receive a sheet, where the sheet can comprise a visible face and a non-seen face in the final manufactured product, a cutting head configured to perform at least one cut on the sheet or set of them such that it generates by division a piece or set of them , pre-designed and in scrap material, a plurality of main fasteners and a plurality of additional fasteners located opposite the plurality of main fasteners.

In the cutting table by numerical control object of the invention, there is a cutting head controlled by a programmable system, which located a piece or set of them on the sheet of material generates the cutting by control of the trajectory that defines its profile. Once the designed part or the set of them has been cut, the programmable element of the cutting table object of the invention determines which main or additional clamping elements have to be operated and to what extent to clamp the parts and the excess material of the form that they can be separated by relative displacement of the surfaces that contain them.

The numerical control cutting table object of the invention is provided with a numerical control or calculation unit with a circuit and the program code to control the cutting machine, which includes a storage unit to store instructions for the part or parts to cut and the necessary control process to separate them by actuating the straight or curved needles or the filaments with which the cutting table is provided by numerical control. In the CNC cutting table object of the invention, the main fastening elements are configured to be partially fixed and without penetrating the pieces designed in the sheet on its unseen side and the additional fastening elements are configured to be nailed on the excess in the visible face of the sheet, such that by means of a relative displacement of the main or additional fastening elements, the excess is removed with respect to the designed pieces that are held by its unseen face without damaging its visible face.

In the CNC cutting table object of the invention the main clamping elements are located on the cutting surface and the additional clamping elements are located on a surface facing the cutting surface or vice versa. As a possible particular implementation of a surface containing main clamping elements, there is a roller and a flat surface facing the cutting surface.

In the CNC cutting table object of the invention, the additional clamping elements are located on an element to choose between a roller and a flat surface facing the cutting surface and the main clamping elements are located on the cutting surface. .

In the CNC cutting table object of the invention the main clamping elements can be located in modules, electrically or mechanically interconnected with each other or not.

In the CNC cutting table object of the invention, the additional clamping elements can be located in modules, electrically or mechanically interconnected with each other or not.

In the CNC cutting table the main clamping elements and / or the additional clamping elements comprise retractable elements.

The retractable elements of the numerical control table object of the invention can comprise straight or curved needles or curved filaments and a mechanical or electromechanical push and retraction mechanism with a spring or any other type of system that allows their recoil. In the CNC cutting table object of the invention, the retractable elements can comprise straight needles that come out with an inclination with respect to the surface that houses them and a mechanical or electromechanical push and retraction mechanism with a spring or any other type of system. that allows its recoil.

In the CNC cutting table object of the invention, the retractable elements can comprise one or more curved filaments housed in a bushing surrounded by a flexible material in the shape of an accordion with a push mechanism configured to at least partially extract a plurality of filaments curved cap in extended position.

In one embodiment of the numerical control cutting table object of the invention the main and / or additional clamping elements form a matrix of bushings surrounded by flexible material with one or more curved filaments housed inside mechanically interconnected so that a force applied to one of these elements will cause the output of the filaments contained in the bushing where the force is applied and to a lesser extent the adjacent ones, inversely proportional to the distance by transmission of force from a mesh that interconnects the elements.

In one embodiment of the numerical control cutting table object of the invention, the roller has the ability to move along the cutting surface and the cutting surface is static, which makes it easier to separate the pieces from single sheets of material or from a stacked set. from the same.

In another embodiment of the numerical control cutting table object of the invention, the main roller, accompanied by a set of secondary rollers that allow the traction of cutting material, advances along the cutting surface in such a way as to allow the continuous material cutting in an intermittent manner.

In another embodiment of the numerical control cutting table object of the invention, the cutting surface makes a relative displacement perpendicular to the additional surface so that the designed pieces are subject to the cutting surface and the excess material to the additional surface , or vice versa, anchored by the main and / or additional fastening elements. Brief description of the drawings

Figure 1 shows the complete process of interaction of physical and non-physical elements from the product order to manufacturing and distribution to the point of sale. The figure includes the cutting table by numerical control object of the invention located in the environment and context of its use.

Figure 2 shows a perspective view of an embodiment of the numerical control cutting table object of the invention for cutting sheets or plates and separating the designed pieces from the surplus material.

Figure 3 shows a perspective view of another embodiment of the cutting table by numerical control object of the invention for the cutting of continuous material intermittently and the separation of the designed pieces from the excess material.

Figure 4 shows a perspective view of another embodiment of the numerical control cutting table object of the invention applicable for cutting plates or continuous material and separating the designed pieces from the excess material.

Figure 5 shows a perspective view of the same embodiment of figure 4 applicable for cutting plates or continuous material and separating the designed pieces from the surplus material.

Figure 6 shows a perspective view of a possible particular embodiment where a set of interchangeable modules houses the retractable elements to generate a flat or curved surface. These modules are arranged in the form of a matrix on the cutting surface of the CNC cutting table object of the invention or on the surface facing it.

Figure 7 shows the mechanical design of an embodiment of the curved retractable elements of the cutting table by numerical control object of the invention where a mechanical or electromechanical actuator extracts or retracts said curved elements. Figure 8 shows the detail of the mechanical or electromechanical drive of figure 7 where it is observed that the linear movement of the actuator translates into a rotation of the curved retractable elements. Figure 9 shows the design of an alternative embodiment to that shown in figure 7 where the linear actuator transmits the movement through gears so that the curved retractable elements of the cutting table can be actuated by numerical control. Figure 10 shows the same mechanism as Figure 9 but in this case, the curved retractable elements are retracted to allow movement of the material on the cutting surface and / or the additional surface.

Figure 11 shows how the curved retractable elements shown in Figures 9 and 10 are inserted into the material from the unseen side to hold the pieces without damaging the visible side of the material.

Figure 12 shows the design of an alternative embodiment to those shown in figures 7, 8, 9 and 10 where the linear actuator transmits the movement to straight retractable elements with recoil capacity to be able to hold or release the material when the system requires it. .

Figure 13 shows how the straight retractable elements shown in Figure 12 are inserted into the material from the unseen side to hold the pieces without damaging the visible side of the material.

Figure 14 shows the design of an alternative embodiment to those shown in figures 7, 8, 9, 10 and 12 where the force applied by an actuator extracts a plurality of filaments that are driven into the material to hold it so that the table CNC cutter has the ability to hold or release the material when the system requires it.

Figure 15 shows the same mechanism as figure 14 but in this case the plurality of filaments are extracted to allow the material to be held on one of the surfaces of the numerical control cutting table object of the present invention. Figure 16 shows a perspective view of the system shown in Figures 14 and

15 with the plurality of filaments extracted to allow the clamping of the material on one of the surfaces of the cutting table with numerical control object of the present invention.

Figure 17 shows a representation of the system shown in Figures 14, 15 and

16 with the extracted filaments holding a section of material on the non-visible side, so that the visible side is not damaged and that allows the material to be held on one of the surfaces of the numerical control cutting table object of the present invention .

Figure 18 shows a perspective view of a plurality of fastening elements such as those shown in figures 14, 15 and 16 in a matrix arrangement, with a lower connection in the form of a mesh that transmits the force applied to one of the elements between its adjacent, so that the plurality of filaments of each element can hold the material on either side as required by the operation of the cutting table with numerical control object of the present invention.

The different numerical references that are reflected in the figures correspond to the following elements:

1. cutting surface,

2. designed part,

3. cutting head,

4. sheet of material to be cut,

5. visible face,

6. unseen face,

7. surplus,

8. main clamping element,

9. additional fastening element,

10. scrap removal roller,

11. module carrying retractable elements,

12. curved needle,

13. electromechanical mechanical push and retract mechanism,

14. additional surface,

15. straight needle, 16. spring,

17. curved filament,

18. caequillo, and

19. flexible accordion-shaped material.

Detailed description of the invention

In view of the foregoing and referring to the numbering adopted in the figures, the object of the invention is a cutting table by numerical control that has a cutting surface (1) configured to receive on it at least one sheet (4), from which one or more designed pieces are obtained (2) by making at least one cut on said sheet (4), by means of a cutting head (3) that is managed by a programmable element or numerical control , these elements being known in the state of the art.

The cutting head (3) moves along the length and width of the cutting surface (1) of the cutting table object of the invention, following the instructions of a programmable element and cutting the designed pieces (2) on the sheet or sheets (4) located on said cutting surface (1), and leaving a surplus (7) that is waste material, which must be removed.

Once the designed piece or pieces (2) have been cut, the programmable element of the cutting table object of the invention determines which designed piece or pieces (2) have to be adhered to the cutting surface (1) and which areas belong to the excess material (7) and must adhere to the additional surface.

The sheet (4) or set of superimposed sheets, which are placed on the cutting surface (1) in the cutting table by numerical control object of the invention, can be of different materials, for example textile sheets or fiberglass or carbon for composites, in which the face of the sheet (4) that faces the cutting head (3) or that face on which an extractor element of the excess (7) is fixed is not important because the material is capable of to withstand an element being nailed into it and recover its original technical and / or aesthetic characteristics. The sheet (4) to be cut may have differentiated faces, as is the case of leather or leather, both natural and synthetic, which have a visible face (5) and an unseen face (6) in the final product, such as that on the visible face (5) it is not possible to act and it is necessary to limit the actions in the visible face (5) to the excess areas (7), since these actions on the visible face (5) damage the material irreversibly.

In the case of sheets (4) of skin or leather, both natural and synthetic, the visible side (5) is called flower and the unseen side (6) is called meat, so that, to proceed with its separation, the face View (5) of the sheet (4) cannot be damaged, so that the result is a designed piece (2) with the visible face (5) intact. The unseen face (6) is the face of the sheet (4) on which it can be grasped to proceed with its separation from the excess (7), so that the unseen face (6) can be grasped as long as from that side is not damaged by drilling the visible face (5). The subjection of the excess (7) from the visible face (5) is carried out by drilling the said face and therefore damaging it, but this material is excess or waste in the process of obtaining designed parts (2). The fastening of the designed parts (2) is carried out from the non-visible face (6), so that the visible face (5) of the designed parts (2) on the sheet (4) is not damaged, so it does not affect to the quality of the aforementioned designed pieces (2) in the final product.

The cutting head (3) moves supported by a support structure that is managed by a programmable element, a numerical control or any other electronic system that executes a previously stored program. By moving a support structure of the Cartesian or polar type, the cutting head (3) can cover the entire cutting surface (1) allowing cuts on the material deposited on the cutting surface (1) to later extract the excess (7) and that the designed pieces (2) remain on the cutting surface (1) or vice versa depending on the orientation of the sheet (4).

For the separation of the designed pieces (2) with respect to the total of the sheet (4), the cutting table object of the invention comprises: a plurality of main clamping elements (8), said main clamping elements (8) being configured to be fixed on the unseen face (6) of the designed parts (2), and to fix the designed parts (2) in their position. a plurality of additional fastening elements (9), configured to be nailed on the surplus (7) and withdraw it with respect to the designed pieces (2).

Once the designed piece or pieces (2) have been cut by the cutting head (3), the programmable element of the cutting table object of the invention determines that main clamping elements (8) or additional clamping elements (9) have to be actuated and to what extent to clamp the designed parts (2) and the excess material (7) to the cutting surface (1) and to the additional surface (14) respectively or vice versa so that both can be separated by relative displacement of the surfaces that contain them.

Regarding the additional fastening elements (9), they can be located on a roller (10) or on an additional surface (14) flat or not located opposite the cutting surface (1) such that the additional surface (14) together with the cutting surface (1) functions as a press, that is, the additional surface (14) moves towards the cutting surface (1) to, by means of the additional fastening elements (9), fix the surplus (7), and In a movement of separation of the additional surface (14) with respect to the cutting surface (1), remove said excess (7) leaving the designed pieces (2) on the cutting surface (1).

In one embodiment of the invention, both the cutting surface (1) and the additional surface (14) located opposite the cutting surface (1), are two flat surfaces, which face and complement each other, however, this embodiment does not It is limiting, since the cutting surfaces (1) and additional (14) may not be flat and continue to fulfill their function.

In the embodiment of the invention, both the main fastening elements (8) and the additional fastening elements (9) comprise retractable elements, which can have different embodiments.

In the removal movement of the excess (7) the additional fastening elements (9) can pass through the visible face (5) and the unseen face (6) of the sheet (4) in case it is made of leather or leather natural or synthetic, since this is waste material. In an alternative embodiment of the invention, the main clamping elements (8) are located either on the roller (10) or on the additional surface (14) and the additional clamping elements (9) are located on the cutting surface. (1), so that the roller (10) or the additional surface (14) removes the designed parts (2) from the excess (7) that remains adhered to the cutting surface (1). In this embodiment of the machine object of the invention, during the cutting of the sheet (4), it is necessary that the The sheet (4) is supported on the cutting surface (1) by its visible face (5) and leaves the non-visible face (6) facing the roller (10) or the additional surface (14).

In one embodiment, all or part of the main and / or additional fastening elements have curved or straight retractable elements, with two extreme positions, a retracted position, in which they do not protrude from the cutting surface (1), from the surface additional (14) or the roller (10) and an extended position, in which they do protrude from the cutting surface (1), from the additional surface (14) or from the roller (10). In another embodiment, all or part of the main and / or additional fastening elements have curved or straight retractable elements, with intermediate exit positions of the cutting surface (1) or of the additional surface (14) so that they partially exit of the aforementioned surfaces thanks to the action of the mechanical or electromechanical push and retraction mechanism (13) and following the instructions contained in the memory of the programmable element of the numerical control cutting table.

It is possible to vary the distance that the curved or straight retractable elements or the curved filaments come out, since said distance may depend on the thickness of the sheet (4) to be cut on the cutting table by numerical control object of the invention. . This particularity is associated with the case that a sheet (4) of thin material could be damaged on its visible face (5) by entering the curved or straight retractable elements through its non-visible face (6), while, as already mentioned Exposed, in the excess (7) it does not matter if the visible face (5) is crossed or not, since it is waste material that is thrown away or recycled. The exit distance of the straight needles (15), of the curved needles (12) or of the curved filaments (17) is carried out by means of the control of the mechanical or electromechanical push and retraction mechanism (13) carried out by the programmable element of the cutting table by numerical control object of the invention.

In an embodiment of the invention, the retractable elements are located in modules (11) distributed on the cutting surface (1), on the additional surface (14) or on the roller

(10) so that if any of the modules (11) has a failure, its replacement is simple since one module (11) is replaced without interfering with the other modules (11) of curved or straight retractable elements. There are several embodiments of the retractable elements that are detailed below, and that together with the other elements mentioned, configure different modules (11) of the cutting table object of the invention: they can be curved needles (12) with a mechanism mechanical or electromechanical push and retraction (13); They can be straight needles (15) that come out with an inclination with respect to the surface from which they come out, which have a mechanical or electromechanical push and retraction mechanism (13) and a spring (16) or any other mechanism to allow their return; and they can also be one or more curved filaments (17) housed in a bushing (18) surrounded by a flexible material in the form of an accordion (19) or in any other way, with a push mechanism or mechanical or electromechanical (13) that it totally or partially extracts the curved filaments (17) from the bushing (18) in the extended position.

In view of the above, the cutting table by numerical control can have retractable element carrier modules (11) mechanically interconnected with each other so that a force applied by a mechanical or electromechanical push mechanism (13) also generates the output of one. or more curved filaments (17) of the adjacent elements inversely proportional to the distance that separates each of them from the pushed mechanism.

Each mechanical or electromechanical push and retraction mechanism (13) can extract the curved needles (12) or straight needles (15) or the curved filaments (17) a certain distance depending on the thickness of the sheet of material to be cut

(4) so that the sheet of material to be cut (4) does not pass through its visible face

(5) when the sheet of material to be cut is being held (4) from its unseen side (6).

The regulation of the output of the curved needles (12) or straight needles (15) or the curved filaments (17) can be done manually by adjusting the movement stops of the corresponding actuators or automatically, by closing the control loop of the actuator by using a sensor that allows knowing its position at all times. These elements are known in the state of the art. The output level of the curved (12) or straight (15) needles or the curved filaments (17) is established in advance, knowing the characteristics of the sheet of material to be cut (4) and depending on its thickness by means of a programmable element that contains the aforementioned information.

The curved filaments (17) housed in the bushing (18) have a curvature such that when they come out of the bushing (18) the filaments stick into the unseen face (6) of the sheet (4) so that they do not cross the face view (5), holding the sheet (4) without damaging the aforementioned visible face (5) of the designed part (2).

The realization of retractable elements formed by one or more curved filaments (17), thanks to the flexible accordion-shaped material (19) located either on the cutting surface (1), either on the roller (10) or on the surface Additional (14) allows the aforementioned curved filaments (17) to be completely embedded on the sheet (4) at that point where a pressure of 100% is applied and as the sheet (4) moves away from the point of application of this force , the pressure exerted on the retractable element is reduced since a mesh transmits the force applied to one of the retractable elements to its adjacent ones, which will come out a percentage less than 100% as it moves away from the element where the maximum force has been applied.

In the embodiment of the numerical control cutting machine that has the roller (10) and the cutting surface (1), according to the configuration of the roller itself (10) and the cutting surface (1) there are three embodiments of the cutting table object of the invention: a first embodiment, focused on cutting material into independent, stacked or single sheets (4), in which the roller (10) moves rolling along the cutting surface (1) of the cutting table object of the invention, so that by activating the additional clamping elements (9) selectively in the excess areas (7) of the sheet (4), as the roller (10) rolls over the sheet ( 4), with the main fastening elements (8) fixing the designed parts (2) to the cutting surface, the excess (7) is wound on the roller (10) and the designed parts (2) remain on the surface cutting (1). After the designed parts (2) are released by the main clamping elements (8), the designed parts (2) can be removed without problem from the cutting surface (1) as they are no longer held by the aforementioned elements. main clamping devices (8); Y a second embodiment focused on cutting a sheet of continuous material, in which the roller (10) moves by rolling along the cutting surface (1) of the cutting table object of the invention in such a way as to actuate the additional clamping elements (9) in the excess (7) and by actuating the main clamping elements (8) to fix the designed parts (2) to the cutting surface (1), the excess (7) is separated from the cutting surface (1 ) being temporarily attached to the roller (10) and the designed pieces (2) attached to the cutting surface (1). When the main fasteners (8) are released, the designed parts (2) can be removed from the cutting surface (1). Once the designed pieces (2) have been removed, the roller (10) returns to its original position, moving without turning so that it pulls a new section of the continuous material to start the process of cutting the sheet (4) again to obtain new pieces. designed (2); and a third embodiment, in which instead of a roller (10) there is an additional surface (14), flat or non-flat, facing the cutting surface (1), such that the additional surface (14) has a movement of displacement perpendicular to the cutting surface (1) so that, by means of the main clamping elements (8) and the additional clamping elements (9), the designed parts are fixed to the cutting surface (1) and the excess ( 7) to the additional surface (14) that contains the additional fastening elements (9), leaving the designed pieces on the cutting surface (1) and the excess (7) being adhered to the additional surface (14).

Claims

1. Numerical control cutting table comprising: a cutting surface (1) configured to receive at least one sheet of material to be cut (4), a cutting head (3) configured to perform at least one cut on the sheet (4) such that it divides the sheet (4) into at least one designed piece (2) and into a surplus (7), characterized in that it also comprises: - a plurality of main fastening elements (8), and a plurality of additional fastening elements (9) located opposite the plurality of main fastening elements (8), where the main fastening elements (8) are configured to fix on the designed parts (2) on an unseen face (6) of the sheet (4); and where the additional fastening elements (9) are configured to be fixed on the excess (7) on the visible face (5) of the sheet (4), such that, by means of a relative displacement between the additional fastening elements (9) and the main fastening elements (8), the excess (7) is removed with respect to the designed parts (2).

2. Numerical control cutting table according to claim 1, characterized in that the main clamping elements (8) are located on the cutting surface (1) and the additional clamping elements (9) are located on an element to be chosen from among a roller (10) and an additional surface (14) facing the cutting surface (1).

Numerical control cutting table according to claim 1, characterized in that the main clamping elements (8) are located on an element to be chosen between a roller (10) and an additional surface (14) facing the cutting surface ( 1), and the additional clamping elements (9) are located on the cutting surface (1).

4. Cutting table by numerical control according to any of claims 1 to 3, characterized in that the main clamping elements (8) are located in modules (11).

5. Cutting table by numerical control according to any of claims 1 to 4, characterized in that the additional clamping elements (9) are located in modules (11).

Numerical control cutting table according to any of claims 1 to 5, characterized in that the main clamping elements (8) and the additional clamping elements (9) comprise retractable elements.

7. Cutting table by numerical control according to claim 6, characterized in that the retractable elements comprise straight needles (15), a mechanical or electromechanical push and retraction mechanism (13) and a spring (16) for their automatic return.

Numerical control cutting table according to claim 6, characterized in that the retractable elements comprise curved needles (12) and a mechanical or electromechanical push and retraction mechanism (13).

9. Numerical control cutting table according to claim 6, characterized in that the retractable elements comprise straight needles (15) that come out with an inclination with respect to the surface and a mechanical or electromechanical push and retraction mechanism (13) with a spring ( 16) for automatic reversal.

10. Numerical control cutting table according to claim 6, characterized in that the retractable elements comprise straight needles (15) that come out with an inclination with respect to the surface and a mechanical or electromechanical push and retraction mechanism (13).

11. Cutting table by numerical control according to claim 6, characterized in that the retractable elements comprise at least one curved filament (17) housed in a bushing (18) surrounded by a flexible accordion-shaped material (19) with a mechanism of mechanical or electromechanical push and retraction (13) configured to at least partially extract the at least one curved filament (17) from the bushing (18) in an extended position.

12. Numerical control cutting table according to any of claims 2 to 11, characterized in that the roller (10) is static and the cutting surface (1) has the ability to have a translational movement.

13. Numerical control cutting table according to any of claims 2 to 11, characterized in that the roller (10) has the ability to move along the cutting surface (1) and the cutting surface (1) is static .

Numerical control cutting table according to any of claims 2 to 11, characterized in that the cutting surface (1) is static and the additional surface (14) has the ability to move perpendicular to the cutting surface (1).

Numerical control cutting table according to any of claims 2 to 11, characterized in that the additional surface (14) is static and the cutting surface (1) has the ability to move perpendicular to the cutting surface (1).

16. Numerical control cutting table according to claims 1 to 15, characterized in that it comprises a mechanical interconnection in the form of a mesh between the main clamping elements (8) and / or between the additional clamping elements (9) such that said interconnection Mechanics transmits the force generated by an actuator to a clamping element (8, 9) and its neighbors.